package org.itstack.demo.design.impl;

import org.itstack.demo.design.ICouponDiscount;

import java.math.BigDecimal;
import java.util.Map;

/**
 * @Author: fanYuLe
 * @CreateTime: 2023-12-28  20:22
 * @Description: 满减
 */
public class MJCouponDiscount implements ICouponDiscount<Map<String,String>> {
    /**
     * 满减计算
     * 1.判断满足x元后-n元，否则不减
     * 2.最低支付金额1元
     * @param couponInfo 券折扣信息：直减、满减、折扣、N元购
     * @param skuPrice 商品金额
     * @return
     */
    @Override
    public BigDecimal discountAmount(Map<String, String> couponInfo, BigDecimal skuPrice) {
        String x = couponInfo.get("x");
        String o = couponInfo.get("n");

        //小于商品金额条件的，直接返回商品原价
        if(skuPrice.compareTo(new BigDecimal(x))<0){
            return skuPrice;
        }
        //减去优惠金额判断
        BigDecimal discountAmount = skuPrice.subtract(new BigDecimal(o));
        if(discountAmount.compareTo(BigDecimal.ZERO)<1){
            return BigDecimal.ONE;
        }
        return discountAmount;
    }
}
